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(No Model.) 1

M. H. KERNER & D. J. BROWN. COMBINED FRASER, POLISHER, AND STAMP. No. 363,469. Patented May 24. 1887.

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UNITED STATES PATENT OFFIC MARION H. KERNER, OF NEW YORK, N. Y.,' AND DANIEL J. BROWN, CF NORWICH, CONNECTICUT, ASSIGNORS TO SAID KER-NEE.

COMBINED ERASER, POLISHER, AND STAMP.

SPECIFICATION forming part of Letters Patent No. 363,469, dated May 24, 1887.

Application filed November 96, I8 4 Serial No. H8359. (No model.)

To all whom it may concern.-

Be it known that we, MARION H. KERNER, of the city, county, and State of New York, and DANIEL J. BRowN, of the city of Norwich, county of New London, and State of Connecticut, citizens of the United States, have invented a certain new and useful Improvement in Combined Eraser, Polisher, and Stamp, which improvement is fully set forth and described in the following specification, reference being had to the drawings which form a part. 0 fand accompany said specification.

The object of our invention is to provide an instrument for rapidly and conveniently erasing written characters, and to combine with thenecessary scraping-edges means for readii y and satisfactorily polishing and hardening the abraded surface preparatory to rewriting thereon; and itconsists ofa short blade formed flat on one side and convex on the other, said blade being a single piece of steel. In the construction of this blade we have endeavored to avoid many of the mistakes heretofore made in the manufacture of erasers, and have produced an instrument which, by reason of the peculiar shape of its cuttingedgcs, will retain its sharpness for a greater length of timc,and which also, by reason of thefact that it is formed ofasolid and substantial piece of metal, will carry a much harder temper, and consequently remain in shape longer, than any other instrument of the kind with which we are familiar. The blade above referred to is also affixed to its handle in a manner unusual in such instruments, whereby the annoyance and inconvenience of the separation of the blade from the handle is practically obviated.

In the accompanying drawings is indicated one of the many useful articles with which our improved eraser may be combined.

Figure 1 is a longitudinal section of our improved eraser combined with a sealing-stamp. Fig. 2is a detail view of the eraser'blade. Fig. 3 is a sectional view taken through the blade and handle. Fig. 4 is a sectional view of the handle itself. Fig. 5 is an end view of one of the sealingstamps.

Similar letters denote like parts.

A represents a handle, which may be constructed of hard rubber, bone, ivory, or any other suitable material. The upper end of the handle is formed with a transverse slot, 11 I), and perforated transversely of the slot,as shown at c. The blade C isa drop-forging of the finest steel, and is made flat at its under side, D, and convex on the reverse side, B. The end of the blade is rounded on each side to a point, the convex side being suitably curved to meet the edges of the plain surface, as indicated at a. The rear end of the blade is prolonged in the form of a broad stout shank or tenon, E, which fits into the slot b, and is firmly secured therein by a rivet or rivets inserted in the aperture 0. The convex side of the blade is made thicker near the commencement of the tenon E, and, While preserving a rounded outline, terminates in a broad deep shoulder,a.,which rests against the end of thehandle and, in connection with the tenon E and rivet 0, forms an exceedingly strong support for the blade.

In erasers constructed according to our i nvention the greatest difficulties in sharpening are overcome, it being only necessary to place the flat portion of the blade upon a flat whetstonc, when the instrument can be readily and quickly sharpened.

The roundedportion of the bladeis, like its face, finished smoothly, so as to be used as a burnisher after the erasure has been made. The opposite end of the handle may be pro vided with a removable stamp, H, which may be of any one of the varieties which it is'convenient to have upon the desk.

The method of using our improved eraser is similar to that of an y other knife eraser. When, however, the ink has beenremoved from the paper, by simply rubbing the abraded surface with the convex side of the blade, the desired hardening effect will be produced.

We find that by making our blade substantial] y as shown and described it contains a suf ficient mass of metal to carry a much harder temper than can be given the thin blade heretofore used, and on this account, and also owing to its peculiarshape, the cutting-edge is much less liable to be gapped and injured, which, taken in connection with the hardness of the material, enables the instrument to remain in good condition much longer than any other with which we are familiar.

We are aware that spoonshaped eraser blades have heretofore been made of thin mil.

terial, and that they have also been made in which the handle was prolonged to form a burnisher, and a thin plate of metal attached to the front thereof; butthis we do not claim, our invention consisting in the production of a combined erasing and burnishing blade formed from a solid piece of metal which blade is furthermore provided with a tenon and shoulden, whereby it is attached to the handle and firmly held in place therein.

\Vhat we claim herein as our invention is A knife eraser the blade of which is formed of a solid piece of metal having one of its sidesrounded or convex, with a smooth surface, and

the other side flat, the junction of the two surfaces forming a cutting-edge, the said blade being also provided with a shoulder adapted to rest against the end of the handle, and a tenon corresponding with a suitable slot therein, substantially as described.

In testimony whereof we have hereunto affixed our signatures in presence of two 'Wib nesses.

MARION H. KERNER. DANIEL J. BROWN.

Witnesses:

FRANK H. ALLEN, TYLER J. HOWARD. 

